Download mode in Galaxy S II GT I9100 can be entered by pressing Volume down Key, Center button, and holding both simultaneously press the Power Button after which a green robot will be shown indicating the Download Mode has been entered.

Open Odin in your computer. Connect your device to the computer with the help of original USB cable and then you will see that the ID : COM Section will turn Yellow.

Note: If ID : COM section doesn’t turn Yellow, you need to check with two things which are mentioned below,

Install the USB Drivers in your computer &

Go to the Path “Settings > Wireless & Network > USB Settings” and ensure that “Samsung KIES” option is ticked before connecting the phone to the computer.

Now, click on the below mentioned options to select the appropriate files.

PDA – CODE_I9100XXLSJ

Phone – MODEM_I9100XXLS6

CSC – CSC_HOME_OXX_I9100OXXLS1

Once you have selected all the files, you will need to click on “Start” to start the process of firmware update. It will take around 4 -5 minutes for applying the update and once the update process is over, the device will be rebooted automatically.

Once the device restarts, the phone will show up the home screen and all you need to do is to just follow the on screen instructions for starting the device. To check on whether the firmware has been successfully updated or not, head over to the path “Settings > About Phone” where the current firmware will be mentioned as Jellybean 4.1.2. Very soon we will be coming out with an article which will help you root the device.

Note: Just in a rare case if the device doesn’t boot up or show the home screen then remove the battery and reinsert the same to boot the device again in the normal mode.

Do let us know in the comments section below just in case if you face any issues as we will be more than happy to help you out. Congratulations, you have now successfully updated your Galaxy S2 GT I9100 device with the latest firmware update of Jellybean 4.1.2.

189 Comments

Rajan

August 5, 2013 at 6:05 pm

contacts,settings,maps,music player takes 3+ seconds to open after clicking the icons
games like temple run & subway surfers hangs while playing
why is this happening ??
plz reply ASAP
otherwise nice update

I have ICS 4.0.4 on my SGS2 9100. Few days ago, I wanted to make JB update to offical 4.1.2 as described in text. But I have big problem in installing via Odin. Com field doesn’t turn yellow and suggested solving option doesn’t exsist in Settings on my S2. Process fails with hour lasting message Downloading… on phone screen. Please help, because two of my friends also have same problem !!

Is there anyone who can help me with this problem which I am facing since the time to updated my phone. Every time I swipe between screens the phone reads it back to me. eg: screen 1 of 5, screen 2 of 5 and so on. I have to off the media volume to avoid hearing it. Please help.

Does anyone facing problems with samsung keyboard? I had a problem to fill a number collumn.. the keyboard will just freeze.. and got error msg “Unfortunately, samsung keyboard has stopped”
Can sum1 respon to this problems..?

And guyz who are updating firmware, Please create a different dropbox account to get that 50GB space. i signed in using the existing same account with which i already have 25GB for my HTC one X and so lost that 50GB thingy 🙁

Guyz, Amazing work as usual. keep it up. Works perfectly. Finally into official firmware again after your first upgrade 2.3.4 i guess for my S2 from 2.3.2 🙂 HTC one X is still stock though. Few hours back, received an update for jelly bean and somehow that’s not this good 🙂 You guyz rock. Cheers!

I’ve updated the software on my phone and now my sim does not pick up internet connections with the new software. other sims work, and my sim works in other devices. i think maybe a software conflict? 2ndly, i hate the 3×4 keybord predictive text, and even after installing my facebook texting data, the keyboard is terrible, giving off words i’ve never used before. please help

I’ve updated the software on my phone and now my sim does not pick up internet connections with the new software. other sims work, and my sim works in other devices. i think maybe a software conflict? 2ndly, i hate the 3×4 keybord predictive text, and even after installing my facebook texting data, the keyboard is terrible, giving off words i’ve never used before. please help

Thanks for the update bro but I ma still stuck with the same issue. I am not able to stop the home screens speaking back to me. With every page swipe it says, page 1 of 5, page 2 of 5 and so on. Please get me out of this bro. Also the battery runs out very fast. If there is no resolution, can you let me know how to go back to ICS 4.0.4…please.

updated my I9100 successfully last three days, but when i make a call, it drops after one minute with the error message “Unfortunately, the process com.android.phone has stopped”After that the network goes off, comes up mins later. Am kind of frustrated, need help pls

Great walk-through, it’s been the smoothest one yet! Brilliant ROM, very happy with it. One issue. After installing, I’ve noticed my internal memory has dropped to 4GB, from just under 12GB before? Not too much of an issue as I have a 32GB MicroSD card, but it would be interesting to know if anyone else has experienced this?

Hey Neal. Tanx a milli. this room is fantastic. extremely snappy, very pleasant to see, has lots of customizations as opposed to the lay official version of ics. the landscape mode it’s fantastic and the new TW is really cool.

Hi Everyone, I really need to get this problem sorted, please someone help me in getting the voice payback off whenever I switch between screen or open or close any folders.For the time being I have turned off the media volume (Music and Video) so that it stops saying everything I do on the home screen, but I need a permanent resolution.

Dear Pradeep, after installing this jelly bean rom can i downgrade to 4.0.3 in future? if yes please then let me know the downgrade process kindly if possible. please reply, Thank you very much. regards

Hi Pradeep, I have been using this update since yesterday but today suddenly my phone started acting strange. Whenever I swipe the screen or open any folder the voice command gets activated. I tried every possible things but unfortunately no success. Please help its very annoying.
Regards,
Sachin K

Upgraded ok works very well. Only 2 issues encountered are unable to add email account with Exchange server setting using SSL. Also Lync not working either. Is this a simple config issues related to SSL or certificates?

can ANYONE pls help me on this…!! don’t know wats wrong with my s2 i9100 (India). everytime i try to appy any of the update, including this one, odin gives me “FAIL” msg. & have tried removing & re-inserting The battery many times. its currently running ICS 4.03 XXLPQ update. have tried earlier 4.04 updates, but get the same msg always… pls help..

Hello Neela. Pls when will you b coming up with the root tutorial for this SGS2 Rom? That’s the only thing holding me back from flashing it, cause without root I won’t b able to get my contacts, messages and apps back like it was before. Pls reply. Thanks.

Yesterday I posted a comment which was not published. I have the same question. Is this Jelly bean update working in India, if not, when is it expected to come out. Please reply, I am getting tempted to root the phone for a custom Jelly Bean ROM but I want to wait for the official update if it is near. I also tried downloading the Jellybean.rar file from this post, but it is not able to download it as too many downloads are done for this file.

Since my question in the “Facebook Comments” section remains unanswered here I repeat the same:

In your previous guides for leaked official updates via odin, always the last step after updating was to restart into in recovery mode for “Wipe data/factory reset” followed by “Wipe Cache partition”. Here you have not included those. Are they necessary still or not?

Not so sure. Updated via Odin here in Aus and no 50 GB extra Dropbox. Same on 2 seperate phones. Downloaded DropBox app. No email, no 50 GB. Nothing in the setup wizard. Wonder if it is region specific?

Installed, it’s brilliant, not yet fully tested but it seems working much better than previous 4.0.3. And also received to my already 2gb dropbox account next 48gigs. For those who wonder how, just sign in with your actual account into dropbox on your device first Wizard screen and CLAIM your space by answering an email you’re about to receive

updated my I9100 successfully yesterday, but when i make a call, it drops after one minute with the error message “Unfortunately, the process com.android.phone has stopped”
After that the network goes off, comes up mins later. Am kind of frustrated, need help pls
MY PHONE IS NOT ROOTED

hey pradeep…!! don’t know wats wrong with my s2 i9100 (India). everytime i try to appy any of the update, including this one, odin gives me “FAIL” msg. its currently running ICS 4.03 official update. have tried earlier 4.04 updates, but get the same msg always… pls help..

Mr. Pradeep, I am still on XXLQ5 without problems except the wiping of serial number as it was turned to zeros.
I am interested in this one but my question is: is it safe in replacing XXLQ5 directly? please answer

Hi, Thanks for this, I applied the leaked version, which was made available few days ago, is the current one any different from the leaked version?. Also it works amazingly fine, but I could not see the task manager which is usually native app to manage the memory. Also, is there any demo on how to use new features? tks

I have gs2 my software version is 4.0.3 ics and my baseband os i9100xxlpx. Non rooted till now. Want to ask as per ur instructions i can do this update directly witout rooting.
Thanks and regards
Juzer

Hi pradeep, I have applied this rom today, and it looks awesome, but the main problem I faced is that when I update my phone to this rom, I face the problem of sim lock, so I had to revert back to ICS and then root and unlock my phone, and tried the update again and same problem, is there any solution to this?

Works great no prbs. But missing lots of features im used 2. Such as hold backkey to kill app, brightness control on notification bar. Im hoping for the root guide, cause it will take a while to get it as I want. It does have some cool features though, better keyboard similar to swiftkey, read contacts aloud on receiving sms, call

Hi Pradeep, I have been using this update since yesterday but today suddenly my phone started acting strange. Whenever I swipe the screen or open any folder the voice command gets activated. I tried every possible things but unfortunately no success. Please help its very annoying.
Regards,
Sachin K

seems like i am having some issues here, i have ICS 4.0.3 build nos IML74kk.xxlpq downloaded to my s2. the green robot comes when i press volume up key, instead of volume down key. when i connect the phone and starts the ODIN it dosent change the color to yellow. I am not able to find the samsung kies in the wifi settings probably it being a ICS and may be it is located somewhere else.

I dont think this as an issue.. its a new feature.. u need to scroll it a little bit on the middle of the screen.. if u scroll it on the left/right of the screen.. it will automaticly zoom in/zoom out..

This is a fantastic ROM. Thanks for the sneak preview. Do you know why ROM manager will only back up to internal sd card, it no longer asks whether i want to back up to the external sd card like it used to. I have remounted the card in recovery but it doesn’t seem to make any difference.

It works beautifully, easy to install. But I found a small problem, even with the data network mode enabled, I do not get the 3G from the mobile network anymore. However, with the WiFi on it is working. How do I correct this situation.